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TILE IT RIGHT Contents Why choose a TTA retailer? 2 Selecting your tiles: 3-7
Special considerations: Fixing Wall Tiles
8 9-11
Fixing Floor Tiles Do’s & Don’ts
12-14 15
WHAT IS THE TILE ASSOCIATION? The Tile Association represents all aspects of the wall and floor tile industry in the UK, from manufacturer to installation. It is dedicated to the advancement of all sectors of the tile industry and delivers real advantages to its members and their customers. It is committed to raising standards of product, installation, sales, training and promotion across the industry. If you buy from a member of The Tile Association, you are guaranteed a quality service or product.
WHY YOU SHOULD CHOOSE A TTA RETAILER? The Tile Association has strict membership criteria which makes a TTA retailer a good starting point for advice on the tiles for your project. They will have hundreds of styles and designs to choose from and will provide the help you need.
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SELECTING YOUR TILES Wall and floor tiles have been used since ancient times; they are hardwearing, easy to clean, water resistant, hygienic and very attractive. Even experienced amateurs used to hesitate at the thought of applying tiles, but the advent of modern tile cutting tools and adhesive now makes the job much easier. This easy step-by-step guide will give the inexperienced the courage to tackle the job and give those with more confidence some tips to avoid common mistakes. If you read this guide carefully, use the correct tools and take your time, you should be able to achieve a reasonable standard of tiling. There are several different types of tile available and they vary in their technical properties. Ceramic tiles sold in the United Kingdom should conform to the British Standard for ceramic tiles, BS EN 14411. It is essential that you select the correct tile for your situation. Your TTA retailer will be able to help you choose the right tile for your project. GLAZED TILES
UNGLAZED TILES
PORCELAIN TILES
Glazed tiles are the obvious choice for walls in bathrooms, kitchens and laundry areas. Glazed tiles are attractive on conservatory floors and in reception rooms but may not be suitable for potentially wet or outdoor use or heavy traffic floor areas.
Generally used in domestic and industrial installations and are available with a slip resistant surface profile for floor tiling in wet areas. They are usually wear, stain and frost resistant; making them ideal for laundry and utility rooms, bathrooms, playrooms and garages.
Extremely attractive and very hardwearing tiles that have extremely low water absorbency. Available as wall or floor tiles, sometimes glazed often with good anti-slip properties, they can be used internally and, providing they are of sufficient slip resistance, externally. These tiles are suitable for domestic and commercial use.
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SELECTING YOUR TILES QUARRY TILES
TERRACOTTA TILES
MOSAIC TILES
Made from natural clay, some are frost resistant and they may be used for floors internally and externally. Their natural clay surface usually provides good slip resistance and they are extremely hard wearing.
These are made from natural clay and vary in water absorbency but generally they are used for flooring and are unsuitable for exterior use, as they are not frost resistant. Most terracotta tiles require surface sealing before and after installation.
Small pieces of ceramic, natural stone or glass usually sold in sheets on a mesh backing or paper facing for ease of fixing.
NATURAL STONE TILES Natural stone tiles include limestone, marble, granite, slate, travertine, quartzite and sandstone. Whilst some natural stone tiles are extremely hard wearing the performance of these materials does vary and you should seek guidance from your TTA retailer on their suitability for your project. Some natural stone tiles may require the use of adhesives and grouts specifically designed for the installation of natural stone tiles. Natural stone tiles should be sealed before grouting. Your TTA Member can advise on suitable sealants and maintenance products.
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HOW MANY TILES DO YOU NEED? First measure the area to be tiled and calculate the area in square metres and ask your TTA retailer to calculate the number of tiles you need. Tiles are produced in batches, and it is important to make sure you have enough tiles from the same batch for your project, so order slightly more than you need. Any extras can be stored for future repairs. Check the batch number on the packaging as soon as you take delivery to make sure the tiles are from same batch.
When calculating irregular areas, divide the area into smaller regular rectangles. (X1 metres multiplied by Y1 metres) + (X2 metres multiplied by Y2 metres) + (X3 metres multiplied by Y3 metres) = Area in square metres.
X1
X2
Y1
X3
Y2
Y3
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WHAT DO YOU NEED?
ADHESIVES There are many different types of adhesive available on the market. As all conditions vary, it is most important that you seek advice so as to use the correct type which conforms to the British Standard BS EN 12004. Always follow the manufacturers’ instructions. This table is intended to help you choose the right adhesive and grout for your tiling project Product type
Classification
Area of use
Floor tiling
Wall tiling
C1 or C2
Wet or dry
Yes
Yes
Dispersion-based
D1 or D2
Damp or dry
See Note 1
Yes
Epoxy-based
R1 or R2
Wet or dry
Yes
Yes
Cement-based
CG1 or CG2
Wet or dry
Yes
Yes
Epoxy-based
RG
Wet or dry
Yes
Yes
Adhesives Cement-based
Grouts
Note 1: Check with the adhesive manufacturer In the classification ‘1’ means standard properties and ‘2’ means improved properties. With dispersion-based adhesives D2 confirms that the adhesive will be suitable in a damp location, e.g. domestic shower wall tiling. With cement-based adhesives C2 confirms that the adhesive will have enhanced adhesion making it suitable for fixing porcelain tiles. Note that with dispersion-based adhesives at least one of the surfaces being adhered together should be porous and absorbent to ensure that the adhesive can dry out and develop adhesion. See the adhesive manufacturer’s product data sheet for adhesive coverage. GROUTS There are many different types of grout available on the market. It is important that you seek advice on choosing the right grout for your project. Ensure that the grout conforms to British Standard BS EN 13888. Your TTA supplier will be able to help you choose the right grout for your project.
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Spirit level, measuring tape, 5 x 2.5cm (2” x 1”) battens (for marking out tiles), tile cutter, pincers (for nipping off the edges), tile adhesive trowel, grouting squeegee, sponge, and spacer pegs. A mechanical tile cutter may be required for porcelain, natural stone products, limestone, marble, granite, slate etc. Tile fixing trim (available in coloured PVC and metals), bath seal, pre-formed movement and control joint profiles will make your job look more professional.
UNDERFLOOR HEATING Underfloor heating can provide a luxurious touch to your home. Make sure that an electrical undertile heating system is installed by a Part P competent electrician. Electrical under tile heating is readily available. It should be installed following the heating suppliers instructions and connected by a Part P competent electrician. Electrical undertile heating systems should be encapsulated before over tiling using either selflevelling compound or a thin layer of tile adhesive. The heating system should be commissioned following the manufacturer’s instructions before and after tiling. It is important to ensure that the underfloor heating system is turned off and cooled down to ambient temperature during the tile adhesive and grouting curing periods. Tiles should then be fixed, using the solid bed method using a category C2 tile adhesive. Movement joints will be required around the perimeter of the floor, and where tiling lies alongside columns, curbs and steps. In large floor areas tiles should be divided by movement joints into bays not exceeding 40 square metres in area. Your TTA retailer will be able to help you choose the right movement joint for your project.
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SPECIAL CONSIDERATIONS FOR BOTH WALL & FLOOR TILING SHOWERS AND WETROOMS In wet situations particularly in bathrooms around the shower it is essential to tile onto an already water resistant background such as tile backer board, using a Category C2 tile adhesive. Porous backgrounds such as plaster or plasterboard can be made waterproof by using a tanking (waterproofing) system. These are usually available from the same supplier as the tile adhesive you plan to use.
LARGE FORMAT TILES With the current popularity of large format tiles it is important to make sure the background is flat, plumb and true before tiling begins. It is also worth bearing in mind that the tolerances for the tile are based on a proportion of the size of the tile. When fixing large format tiles it is essential to use the correct adhesive (Class 2 plus F,T, E, S1 or S2 where applicable. Consult your TTA retailer) and ensure as near as possible 100% coverage of tile adhesive, buttering the back of each tile as you fix the tiles. Large format tiles may not be suitable for fixing in a brick bond pattern.
THIN TILES Advances in technology in the tile industry has allowed for the introduction of thin tiles, which can vary from 3mm to 5.5mm in thickness. Whilst technical standards are being introduced on the product and fixing method it is important that you seek advice from the tile manufacturer and the tile adhesive manufacturer before fixing thin tiles.
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FIXING WALL TILES PREPARATION You will need a perfectly flat surface for tiling. Do not cut corners - preparing the surface is vitally important. 1. Tile backer board is an inert board suitable for fixing tiles in most domestic situations; make sure you follow the manufacturer’s installation instructions so they are adequately supported. 2. New plaster should be left for 4 weeks and be thoroughly dry and brushed down before tiling. Old plaster is suitable, provided it is sound. Check with the tile adhesive manufacturer whether or not the plaster requires priming before tiling can begin. The weight of tiling should not exceed 20 kg/m2. The Tile Association has issued a guidance document about tiling over Gypsum Plaster which is available to download from the Tile Association website. Your TTA retailer should be able to advise if your tiles are suitable. 3. Plasterboard is suitable for walls provided it is well supported with the board being a minimum thickness of 12.5 mm. Fix the tiles directly on the paper facing, do not skim with finish plaster. The weight of tiling should not exceed 32 kg/m2. Your TTA retailer should be able to advise if your tiles are suitable. 4. Painted surfaces. It is very important to make a detailed examination of the surface, as the permanent success of the installation is dependent on good adhesion between the paint and the surface to which it has been applied and between any substrate and basic structure. Remove any old wall covering and flaking paint. Fill in old cracks and voids with a suitable filler. Ensure the surface to be tiled is smooth, clean and free from dust, dirt or grease.
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FIXING WALL TILES SETTING OUT Planning ahead is essential for a good result. Take a long length of timber, mark the tile widths to help you identify where the tile will start and finish, remembering to leave space for the joints, which must be at least 2mm wide. Set out horizontal position of the tiles so that the same size cuts are made either side of windows etc. Avoid small difficult cuts as they can spoil the appearance. Plan each wall carefully, remembering that any patterns/designs will need to be matched in the corners of the room. For plain tiles each wall should be centralised avoiding any small cuts. 1. Find the lowest point of the base you are working to (skirting, bath top, work surface etc.) with a spirit level. 2. Place a tile against the lowest point and draw a line on the wall along the top of the tile. N.B. The start point of the line will depend on the setting out of the tiles, as the tile against the floor may be a cut tile. 3. Nail the batten along the wall to this line. Use the spirit level to ensure it is level. The first line of tiles will rest on this batten. 4. Draw a vertical (plumb) line at the centre of the wall. Use this to check that the tiles are in line vertically. 5. Spread the wall tile adhesive using a tile adhesive trowel onto the wall. Work in small areas a metre at a time, so that tiles are fixed before the surface of the adhesive forms a skin. Press and twist the wall tiles into the adhesive starting at the bottom and working upwards, one row of whole tiles at a time, using spacers (if required) to ensure a uniform joint. Check the horizontal and vertical lines with the spirit level every few rows. 6. Remove surplus adhesive from joints to allow room for grouting and complete the tiling. 7. When tiles need to be cut, your TTA retailer member can explain the various cutters available. 8. In awkward locations it is often easier to apply the adhesive onto the back of the tile instead of the wall. For complicated shapes make a template and transfer the design to the tile.
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9. If the tile does not have a glazed edge, a neat finish on external edges and corners can be achieved with the use of tile fixing trim incorporated at the time of tiling. To prevent the seepage of water around baths, basins and plumbing equipment such as shower taps a plastic sealing strip or silicone sealant should be used. GROUTING Do not begin grouting for at least 24 hours after fixing unless using rapid setting and hardening adhesives. There are many types of grout, so ask your TTA member for the correct grout for your application, especially when using highly glazed tiles. Force the grout into the joints using a grouting sponge. Do not use rigid spreaders as these can cause scratching to certain tile glazes. Remove surplus grout from the surface with a sponge. Polish with a dry cloth.
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FIXING FLOOR TILES PREPARATION Time spent on proper preparation makes the fixing easier, quicker and ensures a better finish. SETTING OUT Planning ahead is essential for a successful project. Laying floor tiles will raise the level of the finished floor, so if possible remove all fixtures before tiling. Check the overall flatness of the floor. A levelling compound can be used to improve flatness levels. Mark a chalk line on the floor down the centre of the room parallel to the most suitable wall (normally this is achieved by viewing the room from the doorway). Lay the tiles down this line and then work towards the wall you think is best, leaving a joint between the tiles of at least 3mm. Tile spacers can be used to achieve a uniform size joint, however they should be removed before grouting. Avoid small cuts, as they can be difficult to cut and do not look professional... CUTTING TILES Floor tiles are generally harder to cut than wall tiles. Modern tools make the cutting of most types of ceramic tiles simple. Ask your TTA member about the various aids available. ADHESIVES Use normal or rapid setting adhesives conforming to BS EN 12004. Always consult your TTA member for detailed advice and follow manufacturers’ instructions. Mix the adhesive as per manufacturers’ instructions and spread with the recommended notched trowel to give a ribbed adhesive bed on the surface to be tiled. Butter the back of each tile with a thin layer of adhesive
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immediately before bedding it firmly into the fresh ribbed adhesive bed with a slight twisting motion to ensure a solid bed and prevent voids under the tile. Some “solid bedding” trowels and pourable adhesives are available that allow the floor tile to be solidly bedded without the need to butter the back of the tiles. Remove surplus adhesive from the tile surface and joints with a damp sponge or cloth. Work in small areas of about 1 sq. metre at a time so that tiles are fixed whilst the surface of the ribbed bed is still wet and workable. Every so often use a spirit level or straight edge to check that the tiles fixed are flat. Remove and adjust the amount of adhesive to achieve a flat surface, but don’t leave it too late or the adhesive will set. Leave adhesive to set before grouting (usually 24 hours unless using a rapid setting adhesive).
PREFER TO USE A TTA TILE FIXER? If you wish to engage a professional use a TTA registered tile fixer you will find a TTA registered fixer in your area in the directory on The Tile Association website at www.tiles.org.uk
In bathrooms, special attention should be paid to sealing the gap between wall and floor base using a flexible antibacterial sealant. A category C2 adhesive should be used when fixing fully vitrified tiles such as porcelain. Consult your TTA member. GROUTING Do not begin grouting or walk on the floor tiles for at least 24 hours (unless using a rapid set adhesive) to avoid disturbing the tiles before they have bonded completely with the adhesive. There are many types of grout so ask your TTA member for the correct grout for your application. Force the grout into the joints using a squeegee. Remove surplus grout from the surface with a sponge and, if required, peg the joints with a rounded stick to achieve an even better finish. Note:- when grouting tiles on a timber floor, use a water-based polymer admixture to improve flexibility. MOVEMENT JOINTS Movement joints allow for movement and help to prevent tile damage. The recommended minimum width is 6 mm, but it depends on each individual application. Movement joints are either field-applied sealant, or a prefabricated profile with anchoring legs which are adhered beneath the tile. Movement joints are normally installed where flooring abuts wall, steps, columns etc., on large floor areas and over structural movement joints. Floors less than 2 metres between walls will not normally require movement joints except where there is under tile heating.
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MAINTENANCE With proper care and attention, a correctly installed, good quality floor tile should give many years of trouble-free service. Grit is the biggest enemy of any floor material and a mat adjacent to external doors is strongly recommended. Terracotta and natural stone tile tiles may need sealing. Ask your TTA member for details, as there are numerous cleaning and maintenance products on the market. TILING ONTO CONCRETE New concrete must be at least six weeks old and thoroughly dry before fixing floor tiles. The surface must be smooth, flat and free from dirt and grease. Uneven surfaces can be improved with levelling compound. TILING ONTO WOODEN FLOORS New concrete must be at least six weeks old and thoroughly dry before fixing floor tiles. The surface must be smooth, flat and free from dirt and grease. Uneven surfaces can be improved with levelling compound. 1. Overlay the existing timber with 15mm dry exterior grade plywood, which has been sealed on the edges and back. Fully screw down the plywood at 300mm intervals ensuring all junctions are supported by noggings or joists. Use a category C2 adhesive. 2. Overlay the existing timber with a proprietary uncoupling membrane and use a category C2 adhesive. 3. Overlay the existing rigid timber with a proprietary tile backer board and install following the manufacturers’ instructions. Use a category C2 tile adhesive. A CG2 grout is recommended with all of these methods. There are many factors to consider when deciding which method is best suited for your particular circumstances. It is important to seek professional advice. For more information on specific products available for fixing to timber floors consult a TTA member tile retailer. TILING ONTO HARD VINYL TILES Existing hard tiles must be free of grease, polish etc. and firmly adhered to the subfloor. The surface of the tile must be primed and allowed to dry before spreading the adhesive (Category C2). TILING ONTO EXISTING QUARRIES, GLAZED AND UNGLAZED TILES Existing tiles must be sound, clean, grease free and firmly adhered to the subfloor. Priming may be required and a Category C2 adhesive should be used. When tiling onto glazed tiles a polymer additive may be required. Consult your TTA adhesive manufacturer.
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DO’S AND DON’T’S DO • • • • • • • • • • • • • • •
Use a TTA tile fixer if you don’t want to do the tiling yourself Think about the ultimate use of the room, bathrooms and kitchens need different types of tiles Ask your TTA retailer for help in measuring your project Allow 10% extra when measuring up for tiles to allow for breakages, cutting etc. Larger tiles may require additional wastage. Ask for help from your TTA retailer, they know about tiles Choose sufficient tiles from the same batch Check the batch number when tiles are delivered Choose the correct adhesive and retailer, ask your TTA retailer for guidance Make sure you have the right tools for the job Prepare the background carefully to make sure it is clean, dry and sound Check the background can take the weight of the tiles you plan to use Make sure the background in your shower or wet area is waterproof before tiling Use the correct protective equipment Carefully set out the tiles before you start Check the levels of your tiling of your tiling as you work
DON’T • • • • • • •
Hesitate to use a TTA fixer if you don’t want to do the tiling yourself Hesitate to ask your TTA retailer for help Choose tiles without us! The TTA’s useful publication is available free of charge to download from our website www.tiles.org.uk Use a paste adhesive when fixing porcelain tiles Dot and dab tile adhesive. Spread adhesive using a notched trowel Butt joint tiles, always allow a gap between tiles Use rigid spreaders for grout as they may scratch the surface of the tiles
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The Tile Association
Forum Court, 83 Copers Cope Rd, Beckenham, Kent BR3 1NR T 020 8663 0946 F 020 8663 0949 E
[email protected]
www.tiles.org.uk
This document, its contents and illustrations are subject to copyright and should not be reproduced in any medium without the express written permission of The Tile Association.
